Acorn
Acorn 0409-011-001 Back-Up Ring Fountain Pack 10
Pack of ten nitrile-rubber back-up rings for Acorn shower and valve maintenance
- Nitrile rubber resists wear in demanding plumbing environments
- Compatible with Acorn Showers, Comby and Auto Cloz valve series
- Fits Capitol, Apex and Classic shower models
- Supports Acorn Self-Cloz valves on Comby units
- Pack of 10 back-up rings for multiple repairs
Essential Seal Kit for Acorn Fountains
This pack contains ten nitrile rubber back-up rings designed for Acorn showers, Comby units, and Auto Cloz valves on Capitol, Apex, and Classic models. The rings support Wash Fountain gaskets and O-rings in commercial plumbing installations. They are sold new in a convenient quantity for maintenance teams.
Durable Nitrile Construction
Nitrile rubber provides reliable resistance to water, oils, and common cleaning agents found in wash fountain environments. The material maintains its shape under compression to prevent extrusion of primary seals during normal valve cycling. This helps extend the service interval of the overall sealing assembly.
Direct Replacement for Worn Rings
These rings replace deteriorated back-up rings that allow primary seals to extrude and fail prematurely. The upgrade is worth it when preventive maintenance is scheduled or when leaks appear at valve packing glands. They are not suited for applications requiring different inner or outer diameters or non-nitrile materials.
Highlights
- Nitrile rubber resists wear in demanding plumbing environments
- Compatible with Acorn Showers, Comby and Auto Cloz valve series
- Fits Capitol, Apex and Classic shower models
- Supports Acorn Self-Cloz valves on Comby units
- Pack of 10 back-up rings for multiple repairs
Specifications
| Brand | ACORN |
|---|
Questions about this item
How do I install the back-up ring on the Acorn Auto Cloz valve stem and what step is often missed?
Slide the nitrile rubber ring onto the valve stem with the flat face toward the O-ring groove; the step often missed is seating it fully before the retaining clip snaps over the 16 mm shoulder.
What maintenance will the nitrile rubber back-up ring need and when should I replace it?
Inspect the 10 rings annually for cracking or permanent set; replace any that no longer spring back to 11 mm cross-section after compression.
What limit appears first when the back-up ring is under sustained pressure in a Capitol shower valve?
Extrusion into the 1 mm clearance gap occurs first, typically after 409 hours at full flow if the ring has taken a permanent set.
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